Metrology - simulator
Metrology - exercises

Solution of reading and interpretation exercises of dial indicator

dial indicator Reading and interpretation of dial indicator in thousandth millimeter or milesimal.

Solution of the exercises list:
Dial Indicator - Reading and interpretation exercises - Metrology

The dial indicators printed in the exercises page has the span (range) of 10mm and resolution of 0.01mm (0.01 - 10.00mm) or span of one inch (1") and resolution of 0.001in (1 - 0.001in).

Solution of dial indicator exercises in millimeter

reading observation
lap counter main dial interpretation
x 1mm x 0.01mm lap counter
+
main dial
1. <1 42 0.42mm the pointer of the main dial has not complete full turn and swept 42 marks.
0 x 1mm + 42 x 0.01 mm = 0.42 mm
2. 5 4(5) 5.04mm the pointer of the main dial completed five turns, and swept 4 marks stopping between the 4th and 5th mark. The number was not rounded, because 4 is an even number. Another possible interpretation is 5.045 mm
3. 2 29 2.29mm
4. 9 85(5) 9.86mm the pointer of the main dial completed nine turns, and swept 85 marks stopping between the 85th and 86th mark. The number was rounded up, because five is an odd number. Another possible interpretation is 9.855mm
5. 9 3 9.03mm
6. 3 6 3.06mm
7. 1 52 1.52mm
8. 4 97(5) 4.98mm apparently the lap counter counted five millimeters. It's missing 0.02mm for the main dial to take five turns.
Another possible interpretation is 4.975 mm
9. 2 63 2.63mm
10. 9 86(5) 9.86mm Other possible interpretation is 9.865mm
11. 8 98(5) 8.98mm Other possible interpretation is 8,985mm
12. 1 28 1.28mm the fact that the pointer of the main dial stop at an intermediate position (between two marks) was compensated for the fact that it started from an intermediate position
13. <1 52(5) 0.52mm Other possible interpretation is 0,525mm
14. 5 2(5) 5.02mm Other possible interpretation is 5,025mm
15. 7 60(5) 7.61mm Other possible interpretation is 7,605mm
16. 9 85(5) 9,86mm Other possible interpretation is 9,855mm
17. 8 98(5) 8.98mm same condition as ex. 11°.
check if you interpretate the same value at both results
18. 1 31 1.31mm
obs. the signal '<1' means that this pointer did not sweep a sector> = 36° (less than one full turn of the pointer of the main dial) '(5)' means that the pointer is between two marks (0.005 mm) the values were rounded by the rule
- even keep it
- odd add one

Solution of dial indicator exercises in inch

reading obsercation
lap counter main dial interpretation
x 0.1in x 0.001in lap counter
+
main dial
1. <1 42 0.042in the pointer of the main dial has not complete full turn and swept 42 marks.
0 x 0.1in + 42 x 0.001in = 0.042in
2. 5 4(5) 0.504in the pointer of the main dial completed five turns, and swept 4 marks stopping between the 4th and 5th mark. The number was not rounded, because 4 is an even number. Another possible interpretation is 0.5045in
3. 2 29 0.229in
4. 9 85(5) 0.986in the pointer of the main dial completed nine turns, and swept 85 marks stopping between the 85th and 86th mark. The number was rounded up, because five is an odd number. Another possible interpretation is 0.9855in
5. 9 3 0.903in
6. 3 6 0.306in
7. 1 52 0.152in
8. 4 97(5) 0.498in apparently the lap counter counted five millimeters. It's missing 0.002in for the main dial to take five turns.
Another possible interpretation is 0.4975 in
9. 2 63 0.263in
10. 9 86(5) 0.986in Other possible interpretation is 0.9865in
11. 8 98(5) 0.898in Other possible interpretation is 0.8985in
12. 1 28 0.128in (between two marks) was compensated for the fact that it started from an intermediate position
13. <1 52(5) 0.052in Other possible interpretation is 0.0525in
14. 5 2(5) 0.502in Other possible interpretation is 0.5025in
15. 7 60(5) 0.761in Other possible interpretation is 0.7605in
16. 9 85(5) 0.986in Other possible interpretation is 0.9855in
17. 8 98(5) 0.898in same condition as ex. 11°.
check if you interpretate the same value at both results
18. 1 31 0.131in
obs. the signal '<1' means that this pointer did not sweep a sector> = 36° (less than one full turn of the pointer of the main dial) '(5)' means that the pointer is between two marks (0.0005 in)
the values were rounded by the rule
- even keep it
- odd add one
Eduardo J. Stefanelli - www.stefanelli.eng.br